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Category 2: Sensitive information <br />9.16 No broadcast transmitters in the 746 to 806 MHz range shall be permitted in SNO911 <br />facilities. <br />9.17 Transmitters in the 806 to 990 MHz range shall have a band pass filter providing a <br />minimum of 15 dB of attenuation 3.0 MHz removed from the operating frequency. <br />Transmitters in this frequency range shall also be fitted with dual isolators providing a <br />minimum of 50 dB isolation. Window filtering with broader responses may be authorized on <br />a case by case basis. <br />9.18 Transmitters in the 1500-2000 MHz range shall have a band pass filter providing a <br />minimum of 15 dB of attenuation 3.0 MHz removed from the operating frequency. <br />Transmitters in this frequency range shall also be fitted with dual isolators providing a <br />minimum of 50 dB isolation. Window filtering with broader responses may be authorized on <br />a case by case basis. <br />9.19 A band pass cavity shall always be used before each receiver. A window filter may <br />be substituted in multi -coupled systems. Crystal filters are also advisable at crowded <br />facilities. <br />9.20 A band reject duplexer may not be used unless accompanied by the required band <br />pass cavities. A pass reject duplexer may be used, provided the duplexer band pass <br />characteristics meet the minimum requirements for transmitter band pass filtering. <br />9 21 All cables used must, at minimum, be double -shielded with 100% braid coverage. Use <br />of solid outer shield cables (i.e., 'Heliax') is strongly encouraged. All external feed lines shall <br />be solid -shielded. <br />9.22 All cables used shall be covered with an insulating jacket. Cables used externally <br />shall be covered with an ultra -violet resistant insulating jacket. No cables with aluminum outer <br />conductors shall be used. <br />9.23 Use of constant impedance connectors shall be required. Type `N,' BNC or 7/16 DIN <br />connector types are typical constant impedance connectors. Adapters shall not be used for <br />permanent connections. <br />9.24 All equipment shall be properly grounded. Grounding shall be performed by grounding <br />the radio equipment manufacturers designated equipment ground and shall be tied to the <br />radio facility equipment ground, preferably using flat copper strap or copper braid. The AC <br />line ground shall also be used to provide the protective ground. Use of three -wire to two -wire <br />adapters shall be prohibited. The facility manager shall identify the radio facility ground point. <br />9.25 All transmission lines shall be fastened to towers, cable trays and other site attachment <br />points using manufactured hardware designed for the purpose. All transmission lines shall <br />be grounded before entry into the radio facility and shall pass through approved lightning <br />protection equipment. Use of cable ties, ty-wraps and similar attachment hardware is <br />SNO911 Master License Agreement 2025 Page 13 <br />Category 2: For official use only / disclosure permissible by law. <br />